The Land Run 100 is an annual gravel grinder race that takes place in Stillwater, Oklahoma. It is a "solo, self supported, non-stop, 100-mile-long bicycling endurance challenge on the gravel and dirt roads surrounding the site of the Oklahoma Land Run of 1889".

The Land Run 100 is a self-supported event. You need to have a well thought-out emergency backup plan, that includes at least one support crew person to come get you, should you need help.

The Land Run 100 field limit is capped at 500 riders. It serves as an early-season warm-up ride for the Dirty Kanza 200. The race is organized and hosted by District Bicycles in Stillwater.